Specification

NEWWAY DN50 PN16 SS304 Stainless Steel Energy Saving Silenced Flanged Check Valve

I. Product Overview

NEWWAY SS304 stainless steel flanged check valve is a critical pipeline component engineered to prevent media backflow while ensuring unidirectional flow in industrial systems. Constructed from high-quality SS304 (CF8) stainless steel, this valve combines corrosion resistance with robust structural integrity, making it ideal for applications involving water, oil, gas, and other non-corrosive fluids. Compliant with international standards such as GB/T 12235, API 598, and ASME B16.34, it delivers reliable performance across a wide range of pressures (PN16-PN40) and temperatures (-29℃ to 425℃).

The valve’s compact flanged design (RF/RTJ) ensures easy integration into existing pipelines, while its energy-saving features—such as minimal flow resistance and rapid closure—reduce system energy loss and prevent water hammer. Whether deployed in water treatment plants, oil refineries, or gas distribution networks, NEWWAY’s check valve provides leak-tight sealing and long-term durability, minimizing maintenance costs and operational downtime.

II. Key Attributes and Specification Parameters

Design and Dimensional Attributes

Valve Type: Lift-type check valve (vertical flow) or swing-type check valve (horizontal flow); the image shows a vertical cylindrical design with flanged ends.

Nominal Diameter Range: DN15 (1/2 inch) to DN200 (8 inches); the sample in the image is DN40.

Pressure Rating: PN16 (1.6 MPa), PN25 (2.5 MPa), PN40 (4.0 MPa); Class 150, Class 300 (ANSI).

End Connection: Flanged (RF) per ASME B16.5 (NPS 1/2 to 8) and DIN EN 1092-1 (PN16/PN40); RTJ optional for high-pressure applications.

Face-to-Face Dimensions: Compliant with GB/T 12221 (China) and ASME B16.10 (USA), ensuring interchangeability with valves from other manufacturers.

Material Specifications

Body and Bonnet: SS304 (CF8) stainless steel (primary); optional SS316 (CF8M) for enhanced corrosion resistance in harsh environments.

Disc and Seat: SS304 stainless steel with precision-ground sealing surfaces; optional PTFE/FFKM soft seals for bubble-tight shutoff.

Spring (if applicable): 316 stainless steel for corrosion resistance; provides controlled opening pressure (0.1–0.3 bar).

Gaskets and Packing: Spiral-wound gaskets (316SS + graphite) for flanged connections; graphite packing with corrosion inhibitors for stem seals.

Performance and Operational Parameters

Temperature Range: -29℃ to 425℃ (SS304 body); -29℃ to 180℃ (PTFE soft seals).

Leakage Class: API 598 Class IV (metal-to-metal seal); Class VI (PTFE soft seal, bubble-tight).

Flow Coefficient (Cv): 12–350 (varies by size); full-bore design minimizes pressure drop.

Opening Pressure: 0.1 bar (DN50–DN200), 0.2 bar (DN32–DN40), 0.3 bar (DN15–DN25).

Cycle Life: ≥100,000 operations under rated conditions.

Testing and Certification

Design Standards: GB/T 12235, API 598, ASME B16.34, DIN EN 12516.

Testing Standards: API 598 (shell, seat, backseat tests); ISO 5208 (leakage classification).

Hydrostatic Testing: Shell test: 1.5× nominal pressure (e.g., 24 bar for PN16); Seat test: 1.1× nominal pressure.

Certifications: ISO 9001 (quality management); CE (European Conformity); ATEX/IECEx (optional for hazardous areas).